39966271 has 2 divisors, whose sum is σ = 39966272. Its totient is φ = 39966270.

The previous prime is 39966229. The next prime is 39966281. The reversal of 39966271 is 17266993.

It is a strong prime.

It is an emirp because it is prime and its reverse (17266993) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39966271 is a prime.

It is a pancake number, because a pancake can be divided into 39966271 parts by 8940 straight cuts.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39966211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19983135 + 19983136.

It is an arithmetic number, because the mean of its divisors is an integer number (19983136).

Almost surely, 2^39966271 is an apocalyptic number.

39966271 is a deficient number, since it is larger than the sum of its proper divisors (1).

39966271 is an equidigital number, since it uses as much as digits as its factorization.

39966271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 43.

The square root of 39966271 is about 6321.8882464023. Note that the first 3 decimals coincide. The cubic root of 39966271 is about 341.8990360061.

The spelling of 39966271 in words is "thirty-nine million, nine hundred sixty-six thousand, two hundred seventy-one".